Q:
      
      
         
            
The NADPH required for the calvin cycle comes from
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: C) Reactions initiated in photosystem 2         
         
Explanation: ATP and NADPH produced by the light reactions are used in the Calvin cycle to reduce carbon dioxide to sugar. The Calvin cycle is similar to the Krebs cycle in that the starting material is regenerated by the end of the cycle.
       
      
      
      
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